.stairs{
    // background: pink+22;
    position: fixed;
    left: 10px;
    top: 50%;
    margin-top: -10%;
    z-index: 999;
}
.stairs li{
    width: 60px;
    height: 60px;
    margin-bottom: 1px;
    background: #fe6397;
    color: #fff;
}
.stairs-first{
    box-sizing: border-box;
    padding: 10px;
    // line-height: 35px;
    text-align: center;
    font-size: 14px;
    font-weight: 500;
}
.stairs-second a{
    display: block;
    height: 60px;
    overflow: hidden;
    background: url(http://a4.jmstatic.com/00ee6e4ce1a1f31f/pc_new.jpg) #fe6397 no-repeat;
    background-position: -176px 0;
    color: #fff;
}
.stairs-second p{
    margin-top: 40px;
    text-align: center;
    
}
.stairs-third a{
    display: block;
    height: 60px;
    overflow: hidden;
    background: url(http://a4.jmstatic.com/00ee6e4ce1a1f31f/pc_new.jpg) #fe6397 no-repeat;
    background-position: 0 -124px;
    color: #fe6397;
}
.stairs-third p{
    margin-top: 40px;
    text-align: center;
    
}